6" Insulated Aluminum Flexible HVAC Duct R-8.0 – 25' Length 18" Diameter and waste gases transmission lines

and waste gases transmission lines

antique bronze

& EN 13180 standards

Looks Like It Was Just Waxed

Every grille has a front end frame that will overlap at the wall joint

6" Insulated Aluminum Flexible HVAC Duct R-8.0 – 25' Length 18" Diameter and waste gases transmission lines+ Product Details High Quality Aluminum housing on the outside and on the inside for the best insulation value Insulation A thick blanket of fiberglass insulation provides you with an R Value of 8. 0 Energy Efficient Air tight inner core decreases the pressure loss and provides a more hygienic environment high energy efficient No fiberglass erosion into air stream Design Designed to withstand bends and sharp turns without kinking. Tough reinforced